But Halemano is right, if a DM or instructor got certified becaused he bought these PADI exams on ebay. Do an old search on ebay, and you will note that folks have bought OW, rescue, and DM exam from a frequent dealer there. At the OW level, it doesn't bug me too much. But at the higher level, what's the point of cheating? Will that make you a better instructor?
Again, the SSI exam I have in my possession was handed out to me, and again to my son.... It was never intended to be a proctored or close book exam. So I don't feel too guilty sharing it with someone who might benefit from using it to brush up their dive skill.
I, like many others, have copied pages from our OW and rescue book, to hand them in at the end of courses. In the same way, I preserved the SSI exam so I can retest my son before we go diving the next season. We have little quizzes on the way to school, and I can tell you, he will have his 5 points of ascent and 5 points of descent so memorized, that you will not see him shooting to the surface at breaking speed.